Improvement in propelling boats by oars



T. G. PRING'LE.

Improvement in Propellin'g Boats by Oa'rs.

Patentedlune 20,1871.

. UNITED STATES PATENT ...OEEIoE THOMAS Gr. PRINGLE, 0F `NEW YORK, N. Y.

IMPROVEMENT IN- P ROPELLING BOATS Bv oARs.

Specification forming part f Letters Patent No. 116,095, dated June 21871n.

To all whom it may concern Be it known thatI, TEoMAs G. PRINGLE, of New York,in the county of New York and State of New York, have invented a new and useful Improvement in Propelling Boats by Hand 5 and I do hereby declare that the following is a full,'clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which- Figure 1 is a top view of my improved device,- part being broken away to show the construction. Fig. 2 is a detailA sectional view of the same taken through the line a' x, Fig. 1.

Similar letters of referenceindicate like parts.

My invention has for its object to furnish an l improved means for the propulsion of boats by hand, which shall be so constructed and arranged that the rower when propelling his boat may sit with his face toward the bow so as to look in the direction in which his boat maybe advancing, and which shall at the same time allow him to feather his oars in rowing; and it consists in the construction and combination of the various parts, as hereinafter more fully described. 1

A is the oar, which is made in two parts, al and a2, the adjacent ends of which are pivoted to and between two plates7 B, by bolts or rivets, as shown in Figs. l and 2. The plates B are also connected and held in theirv proper relative positions by studs 0uponthe outer sides of which are formed the pivots or journals D, by which the oar is connected to the oar-lock. Upon'the adjacent ends of the parts al anda2 of the oarA are formed, or to them are attached, segments of gear-wheels E, the teeth of which mesh into each other, as shown in Fig. l. By this construction the handle and blade of the oar will move in the same direction, enabling the rowerto sit with his face'to the bow of the boat while rowing.. The rowj lock is made in two parts, F and Gr. The in` terior part F, in bearings in the ends of which the pivots of journals D- work, is made in the form of an arc or semicircle, as shown in Fig.

2. The convex side of the semicircular piece F is grooved to t upon the concave side 'of the part Gr, as shown in Figs. 1 and 2, and is secured to said piece G, while, at the same time, it is left free to slide longitudinally by a set-screw, f, which passes through the side of the piece F, and the forward end of which enters a groove. in the sideof the piece G, as

shown in dotted. lines in Fig. 2. Upon the midimmovably secured to the piece G by simply tightening the set-screw f. 4

l Having thus described my invention, I claim as new and desire to secure by Letters Patent- l. The oar-lock, formed in two parts, F G, constructed and arranged as and for the purpose speciiied.

2. The combination of the row-lock F G, constructed as described, journals l), studs C,

plates B, and segmental gear-wheels .E with` each other and with the adjacent ends of the parts al and a2 of the oar A, substantially as herein shown and described, and for the purpose set forth. y

Y THOS. G. PRINGLE.

Witnesses: V

ALEX. F. ROBERTS, JAMES T. GRAHAM. 

